Perhaps you should try some spelling variations:
thanh vien » nhan vien, thanh van
hieu vien » hieu hien, hieu viec, thieu nien
vien ban » viec ban, dien ban, kien ban
ban duoc » tan duoc, van duoc, ban thuoc
thanh vi » hanh vi, thanh va, thanh ve
duoc gia » duoc giao, quoc gia, duc gia
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
sac ky » cac ky, sai ky
tu sac » tu sach, tu cac, tu san

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu vien ban duoc gia ((thanh vi) or (thanh vien)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu vien ban duoc gia ((thanh vi) OR (thanh vien)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky ((nang xa) OR (lang xa)) hoi. hieu vien ban duoc gia ((thanh vi) or (thanh vien)) cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky ((nang xa) OR (lang xa)) hoi. hieu vien ban duoc gia ((thanh vi) or (thanh vien)) cua tre*.